There are many free programs that you can install to protect your computer from viruses and other attacks.But when downloading and installing you must always check all options to make sure you really install the FREE version of the program and not the payable version.Also when installing FREEWARE you should always choose the customized installation as most companies will install also third-party software like tool bars for your computer to make money with advertisement. This tool bars use up the space of your display and also make loading of your browser slower.